What is a Phonon?

The common answer to this question is that a Phonon is the vibration of the lattice. My concern is whether or not this is limited to the vibration of the lattice? Are Phonons not in general waves...

04 May 2018 1,635 7 View

What is the maximum magnetic flux density measured in the lab currently?

I will be happy if you gave your response in SI units. Give citation if possible. Thank you in advance.

09 October 2016 3,262 4 View

Quarks: Why Three Inside the Proton and Why Fractional Charges?

I will be interested to hear your views on the work I have done here. I proposed three curved spacetime Dirac equations in 2008 in the Journal Foundations of...

02 March 2016 9,995 0 View

What does it mean to have Orthogonal Quantum States?

I am working a version of the Dirac equation. This version have only two solutions, one for the positive energy state and the other for the negative energy state. I find that this version of the...

01 February 2016 4,722 14 View

Can the Pioneer Anomaly be caused by mass accretion from the the Interplanetary Medium?

For quite sometime now, I have thought about the Pioneer Anomaly, I have read a number of papers on this, and in all my searches, I have not come across a suggestion as that presented in the...

07 August 2015 7,189 0 View

Is the Big Bang Theory correct on its untested (and untestable) hypothesis that all matter in the Universe was created at an instant?

01 February 2015 9,533 5 View

Is Relativity's Equal Footing Treatment of Space and Time Correct in its Entirety?

As well known, the General Theory of Relativity (GTR) was introduced along with the principle that there exists no system of coordinates that is preferred, but that any arbitrary system of...

01 February 2015 3,916 12 View

Is there a Dirac equation for the Proton or Neutron?

To the best of my knowledge, because the Dirac equation explains very well the gyromagnetic ratio of the Electron, it is typically considered to be an equation for the Electron. There seems to be...

31 December 2014 6,205 15 View

Do you know of any non-Euclidean geometries that preserve both the length and the angle upon parallel transport?

For example, Riemann geometry is a non-Euclidean geometry that only preserves the length upon parallel transport. I have come up with a geometry that preserves both the angle and length upon...

10 November 2014 7,773 10 View

Do you think a Unified Field Theory is acheivable on a four dimensional continuum of spacetime?

In this reading, we vigorously demonstrate that all the known forces can be described by a single four vector potential. The theory is a unified theory not of just the four known forces, but of...

10 November 2014 6,442 1 View

Physics: Why do we describe light by referring to its wavelength, but microwaves and radar pulses by referring to their frequency?

In physics, the description of the properties of light generally refers to its wavelength (nm), while in the range of microwaves and radio waves we refer to the frequency of a signal (e.g. kHz or...

03 March 2021 1,682 3 View

Why are the velocities so high in my Boussinesq approximation Fluent simulation?

Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...

02 March 2021 4,910 3 View

Why almost every element would be metallized in sufficiently high pressure and low temperature?

(This statement is from wikipedia, BTW). What is so special about metallic bond that is limiting high-P low-T state of a matter (as long as individual atoms exist, not white dwarf of neutron star...

02 March 2021 3,309 2 View

What is the density for pva electrospining?

I'm Juan Carlos, a high school student who is working with electropinning, I made an electropinning machine with a 21g needle and a 30kv high voltage source and the distance between my needle is...

28 February 2021 298 3 View

Should we reduce the standard unit of length to 0.31951540592 meter ?

The reasoning behind this question is to align the ratios of the proton potential in energy per charge to the speed of light in distance per time. As these two dimensions appear to be related,...

27 February 2021 947 7 View

How do you mesh a thin solid in Fluent?

Hello, I have used the shell function on SpaceClaim to create thin solids for the model I am studying. These are contained within an enclosure for my study. I chose this approach as it avoids the...

24 February 2021 8,856 3 View

No streamlines present in a small region inside a flow. This means exactly what?

No streamlines present means whether the flow is getting obstructed there and the velocity inside the region is zero? Or else, the fluid is trapped inside that region with a nonzero velocity?...

22 February 2021 5,249 10 View

How to solve the fatal error "the entire source was rejected" in MCNP?

Simple geometry was made having concentric cylinders bounded by a square region. The geometry has a reflective boundary. The source was defined at one point in the boundary and when it had been...

17 February 2021 4,364 3 View

How complex systems physics/statistical mechanics would be helpful for particle physics & Networking?

Recently, I've been selected for an ICTP program named Physics of Complex Systems. But, I have a keen interest in Particle Physics & Quantum networks. As statistical mechanics involved in...

11 February 2021 699 3 View

Applications of General Multiple Sums?

Does anyone know of applications of multiple sums of a sequence? I know of the Multiple Zeta values (which is a multiple sum of 1/N^s). This has multiple applications in quantum physics, QED,...

08 February 2021 8,047 12 View